shown in a contrasting colour, or in characters not exceeding 50 millimetres in height, where they are embossed in the same colour; and
(ii) information about the manufacture of the sign required in order to comply with British Standard Specification BS 873 or a corresponding EEA Standard, occupying an area not exceeding 30 square centimetres, may be indicated on the back of the sign in characters not exceeding 5 millimetres in height.
(2) Paragraph (1) shall apply to the back of any backing board or other fitting provided for the assembly of such a sign as is referred to in paragraph (1) (including any container enclosing apparatus for the illumination of such a sign).
(3) The back of the sign shown in diagram 7104 or 7105 shall be coloured grey, red, white, black or yellow, except that—
(a) information about sites for placing and the ownership of the sign may be indicated on the back of the sign in characters not exceeding 50 millimetres in height, where they are shown in a contrasting colour, or in characters not exceeding 80 millimetres in height, where they are embossed in the same colour; and
(b) information about the manufacture of the sign required in order to comply with British Standard Specification BS 873 or a corresponding EEA Standard, occupying an area not exceeding 30 square centimetres, may be indicated on the back of the sign in characters not exceeding 5 millimetres in height.
(4) The back of the sign shown in diagram 651, 970, 971, 972, 973.2, 973.3, 2610, 2610.1 or 2610.2 may be of any colour.
(5) The front of any backing board for a sign mounted otherwise than as described in paragraph (1)(a) shall be coloured either grey or yellow.
(6) A yellow backing board for a sign (except one for the sign shown in diagram 2402.1) shall be rectangular in shape.
(7) A backing board for the sign shown in diagram 2402.1 may be of any shape including rectangular.
(8) The sign shown in diagram 2403.1 shall not be mounted on a backing board with any other sign.
(9) In this direction "backing board" in relation to a sign includes any background (except a wall to which the sign is affixed) against which the sign is displayed.
Mounting of the sign shown in diagram 781
43. The sign shown in diagram 781 shall be mounted on two posts and so much of each post as extends above ground level shall be coloured black and white in alternate horizontal bands, each band being not less than 250 nor more than 335 millimetres deep. Mounting of the signs shown in diagrams 560 and 561
44.—(1) The sign shown in diagram 560 or 561 shall be so placed that the top of the sign is not less than 550 nor more than 1000 millimetres above the surface of the adjacent carriageway.
(2) Where the sign shown in diagram 560 or 561 is mounted on a post specially provided for the purpose that part of the post which extends above ground level may be—
(a) of any single colour; or
(b) coloured black and white in alternate horizontal bands, each band being not less than 225 nor more than 350 millimetres deep.
(3) The signs shown in diagrams 560 and 561 shall be so erected as to display—
(a) the colour red on the left hand edge of the carriageway as viewed by the drivers of approaching vehicles; and
435
